<template>
    <div>
      <!--      面包屑导航区域-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
<!--      卡片视图区域-->
      <el-card>
<!--        alert警告框-->
        <el-alert
          title="添加商品信息"
          type="info"
          center
          show-icon>
        </el-alert>
<!--        步骤进度条-->
        <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
<!--        tab侧边栏-->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
          <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.goods_price" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input v-model="addForm.goods_number" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.goods_weight" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <el-cascader
                  v-model="addForm.goods_cat"
                  :options="cateList"
                  :props="cateProps"
                  @change="handleChange">

                </el-cascader>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
<!--              渲染表单的item项-->
              <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
<!--                复选框组-->
                <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox v-for="(cb,i) in item.attr_vals" :key="i" :label="cb" border></el-checkbox>
                </el-checkbox-group>

              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
              <el-upload
                action="https://www.liulongbin.top:8888/api/private/v1/upload"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture"
                :headers="headerObj"
                :on-success="handleSuccess"
              >
                <el-button size="small" type="primary">点击上传</el-button>
                <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
<!--              富文本编辑器组件-->
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
<!--              添加按钮-->
              <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
      </el-card>
<!--      图片预览的对话框-->
      <el-dialog
        title="提示"
        :visible.sync="previewDialogVisible"
        width="50%">
        <img :src="previewPath" alt="" class="previewImg">
      </el-dialog>
    </div>
</template>

<script>
  import _ from 'lodash'

  export default {
    name: 'add',
    data(){
      return {
        // 默认激活步骤
        activeIndex:'0',
        //添加表单的数据对象
        addForm:{
          goods_name:'',
          goods_price:0,
          goods_number:0,
          goods_weight:0,
          //商品所属的分类
          goods_cat:[],
          //上传图片的数组
          pics:[],
          //商品详情介绍
          goods_introduce:'',
          //商品动态静态属性的数组，数组内是一个个对象
          attrs:[]
        },
        //表单的规则验证对象
        addFormRules:{
          goods_name:[
            { required: true, message: '请输入商品名称', trigger: 'blur' }
          ],
          goods_price:[
            { required: true, message: '请输入商品价格', trigger: 'blur'}
          ],
          goods_number:[
            { required: true, message: '请输入商品数量', trigger: 'blur' }
          ],
          goods_weight:[
            { required: true, message: '请输入商品重量', trigger: 'blur' }
          ],
          goods_cat:[
            { required: true, message: '请选择商品分类', trigger: 'blur' }
          ]
        },
        //分类列表
        cateList:[],
        //级联选择框的配置对象
        cateProps:{
          expandTrigger: 'hover',
          label:'cat_name',//能看见显示的那个
          value:'cat_id',//选中的那个值
          children:'children'
        },
        //动态参数的数据列表数组
        manyTableData:[],
        //静态参数
        onlyTableData:[],
        //图片上传组件的请求头对象
        headerObj:{
          Authorization:
          window.sessionStorage.getItem('token')
        },
        //预览图片的地址
        previewPath:'',
        //图片预览对话框
        previewDialogVisible:false,

      }
    },
    created () {
      this.getCateList()
    },
    methods:{
      async getCateList(){
        const {data:res} =await this.$http.get('categories')
        if(res.meta.status!==200){
          return this.$message.error('获取分类列表失败')
        }
        this.cateList=res.data
        // console.log(this.cateList)
      },
      //级联选择器选中项变化，就会触发这个函数
      handleChange(){
        console.log(this.addForm.goods_cat)
        if(this.addForm.goods_cat.length!==3){
          this.addForm.goods_cat=[]
        }
      },
      //阻止tab切换
      beforeTabLeave(activeName, oldActiveName){
        if(oldActiveName==='0'&&this.addForm.goods_cat.length!==3){
          this.$message.error('请先选择商品分类')
          return false
        }
      },
      //切换tab时触发的事件
      async tabClicked(){
        //商品动态参数
        if(this.activeIndex==='1'){
          const {data:res} =await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
          if(res.meta.status!==200){
            return this.$message.error('获取商品分类列表失败！')
          }
          console.log(res.data)
          res.data.forEach(item=>{
            item.attr_vals=item.attr_vals.length === 0?[]: item.attr_vals.split(' ')
          })
          this.manyTableData=res.data
        }
        else if(this.activeIndex==='2'){
          const {data:res} =await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
          if(res.meta.status!==200){
            return this.$message.error('获取商品静态参数失败！')
          }
          console.log(res.data)
          this.onlyTableData=res.data
        }
      },
      //图片预览的效果
      handlePreview(file){
        this.previewPath=file.response.data.url
        this.previewDialogVisible=true
      },
      //移出图片的操作
      handleRemove(file){
        console.log(file)
        //1.获取将要删的图片的临时路径
        const filePath=file.response.data.tmp_path
        //2.从pics这个数组中，找到要删除的图片的索引
        const i = this.addForm.pics.findIndex(x=>x.pic===filePath)
        //3.splice,把图片信息对象，从splice数组中删除
        this.addForm.pics.splice(i,1)
      },
      //图片上传成功后的狗子函数
      handleSuccess(response){
        // console.log(response)
        const picsInfo = {pic: response.data.tmp_path}
        // console.log(picsInfo)
        this.addForm.pics.push(picsInfo)
        console.log(this.addForm)
      },
      //添加商品
      add(){
        // console.log(this.addForm)
        //表单的预验证
        this.$refs.addFormRef.validate(async valid=>{
          if(!valid){
            return this.$message.error('请填写必要的表单项')
          }
          //需要将goods_cat数组转换成字符串才能发起请求，但是联级选择器中用到了goods——cat这个数组
          //所以现在需要深拷贝一个addForm出来，让新拷贝的进行数组到字符串的转化
          const form =_.cloneDeep(this.addForm)
          form.goods_cat=form.goods_cat.join(',')
          //处理一下attrs这个数组，将动态和静态参数都push到attrs中去
          //动态
          this.manyTableData.forEach(item=>{
            const newInfo = {
              attr_id:item.attr_id,
              attr_value:item.attr_vals.join(' ')
            }
            this.addForm.attrs.push(newInfo)
          })
          //静态
          this.onlyTableData.forEach(item=>{
            const newInfo = {
              attr_id:item.attr_id,
              attr_value: item.attr_vals
            }
            this.addForm.attrs.push(newInfo)
          })
          form.attrs=this.addForm.attrs
          console.log(form)
          //发起请求
          const {data:res} = await this.$http.post('goods',form)
          if(res.meta.status!==201){
            return this.$message.error('添加商品失败！')
          }
          this.$message.success('添加商品成功！')

          this.$router.push('/goods')
        })
      }
    },
    computed:{
      //取到三级分类的id
      cateId(){
        if(this.addForm.goods_cat.length===3){
          return this.addForm.goods_cat[2]
        }
        return null
      }
    }
  }
</script>

<style lang="less" scoped>
.el-checkbox{
  margin: 0 10px 0 0 !important;
}
  .previewImg{
    width: 100%;
  }
  .btnAdd{
    margin-top: 15px;
  }
</style>
